Write-downs and Other Charges, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Losses on Asset Disposals and Other Nonroutine Transactions [Abstract]
Business Combination, Acquisition Related Costs	$ 800
Available-for-sale Securities, Gross Realized Gains	100
Write-downs and other charges [Abstract]
Write-downs and other charges, net	$ 1,028	$ 2,368
Transaction related costs		1,300
Losses on asset disposals and severance expense		$ 1,100